hf filter

Japan DX Cluster - HF DX Web Cluster from JAPAN

HFDX - French web site for hf dxing

Pactor News - Ham Radio Newsletter dedicated to HF communications and the PACTOR user

F6CRP Denis Priority listing - Site devoted to weak signal traffic SSB/CW V/UHF meteor Scatter,tropo, aurora, fai, ES homebrew

PA5DD Uffe - VHF & microwave web site

K-Com - comprehensive line of products for rejection of Radio Frequency Interference (RFI) to telephone equipment.

Hal Communications - HF radio data communications products, analog and DSP modems

Intek - CB radios, VHF transceivers, scanners antennas and accessories

Ten Tec  ^pop - HF, VHF, transeivers kit's, amplifiers and more.

Diamond Antenna  ^pop - Base station and repeater antennas, mobile antennas, ,multi-band HF antennas , handheld transceivers, receiving and scanner antennas, power meters, swr meters, power supplies, coaxial switches

GB3DM - Dumbarton District's UHF Repeater in Scotland

HF RTTY Stations - ik8enh list of HF stations transmitting in RTTY with Baudot/Schift, frequency and call

ST2NH Nader - Many satellites homebrew projects from the sudanese amateur radio station ST2NH active on satellites, ISS, HF phone and digital modes.

Sporadic-E - Short notes about sporadic E influence on VHF propagation

Ten Tec Orion II Official page - Orion II HF DSP Transceiver

The AM stereo page - A comprehensive listing of AM Stereo radio stations in North America with listening tips, news, AM mono to stereo radio conversion information, sources of AM Stereo receivers and a history of AM Stereo broadcasting.

Scaning The Utilities - Hf, vhf, and uhf utility listening, police frequencies, shuttle, aero, usaf callsigns and many other services

PolarPlot - Freeware antenna software that lets you see what the polar diagram of your rotatable beam actually looks like where it is operating. With PolarPlot you can measure the polar diagram of the antenna and check for abnormalities - compare plots taken before and after changes to the design or location - check the -3dB beamwidth - look at the front to back ratio - see the size and position of the sidelobes.

AirMail - AirMail is a HF radio mail program for sending and receiving messages via Pactor, either via the ham radio system or participating marine or commercial services

Spectran - Program designed to do spectral analysis and real-time audio filtering on reception of audio signals for EME, VLF, SETI applications. Offer support for MTHELL, QRSS, DFCW, NDB, WSJT by I2PHD

Embaycom 2.1 - Baycom modem emulator, EMBAYCOM.ZIP for HF 300 baud Packet EM1200M2.COM - for 1200 VHF Packet Tested with BAYCOM-soft v1.5 and 1.6

FTBasic  ^pop - FTBasic is a CAT control program for Yaesu radios FT100, FT817, FT847, FT1000MP Mark V and FRG100

Pathfinder - A free application that searches more than 100 web-accessible sources to locate QSL information for a callsign that you enter once

Fitting a PL259 to a coaxial cable - Quick and dirty method to fit a common PL259 to coax cable

KI5YN QLF Filter - The QLF filter is a microprocessor based interface designed to go between a standard Morse code key and a radio transmitter